Bart Schaefer wrote Thursday, June 21, 2007 3:21 AM:
That [. . .] makes me think that you're using a UW IMAP server
and you're trying to fool it [. . . .]
It's possible, even probable, that the IMAP server has
recognized that a message that it has never seen before has
somehow acquired a keyword, and is therefore deleting it, so
that a malicious sender can't change the way your email is
processed. The server has no way to know that you added the
header yourself with procmail.
I think this is right. Some servers use the Message-ID and
delete subsequent copies of cached values. Personally, I
don't like the approach. (I asked my ISP to disable the
"feature" for my account, and it did so.) I'd suggest
either disabling that behavior on the server or, as a
workaround, rewriting the Message-ID. Formail can do the
latter, as long as you're using it.
Dallman
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